Issues with +mu4e/attach-files

### What did you expect to happen?

Function +mu4e/attach-files works from ranger/deer buffer.

### What actually happened?

calling +mu4e/attach-files on a marked file in a deer/ranger buffer just pops up a find-file dialog but never attaches or promps for user to compose a new message.

### Describe your attempts to resolve the issue

I can regain some functionality by replacing the line that says `'(dired-mode` with a line reading `((or 'dired-mode 'ranger-mode 'deer-mode)`

But there still seems like some issues.
1. I can't attach a file to a message in another frame.
2. Even with this fix, I can't seem to attach a message if there is not already a message open.
3. Really I should say what I can do -- this only seems to work if I want to attache a marked file in a deer/ranger buffer to a message that is already open in the same frame.

So, seems like there may be a few issues needed to make this function work with deer/ranger.

### Steps to reproduce

1. Setup mu4e module as described in doom mu4e module documentation.
2. Setup dired module with +ranger flag
3. try attaching any marked files using +mu4e/attach-files

### System Information

https://pastebin.com/PbWumU6e